CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Statement of Comprehensive Income [Abstract]
Net income	$ 325,965	$ 340,848	$ 359,081
Other comprehensive income (loss), net of tax:
Changes in net prior service credit and net actuarial losses, net of tax (provision) benefit of $(7,691), $8,908 and $(18,850), respectively	23,210	(37,259)	49,130
Change in fair value of derivatives, net of tax provision of $(177), $(483) and $(725), respectively	556	1,555	2,329
Foreign currency translation, net of tax benefit (provision) of $3,802, $(7,590) and $(9,695), respectively	70,183	(49,778)	(50,334)
Other comprehensive income (loss)	93,949	(85,482)	1,125
Comprehensive income	$ 419,914	$ 255,366	$ 360,206